Desulfurized-gypsum-base lightweight spraying gypsum mortar

A technology for desulfurized gypsum and gypsum mortar, which is applied in the fields of comprehensive utilization of solid waste and building materials, can solve the problems of high thermal conductivity that cannot meet the requirements of building energy-saving development, large capacity of cement plastering mortar, and reduced indoor use area, etc. The effect of improving pumpability and sprayability, high ergonomics, and improved operating performance

Inactive Publication Date: 2016-03-02
JIANGSU NIGAO SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nowadays, energy-saving and thermal insulation of buildings is a major trend of construction. With the improvement of building energy-saving rate, the energy-saving requirements of building interior walls, household walls, household floors, stair partition walls and other parts are also gradually increasing. The existing cement Plastering mortar has a large bulk density, which not only increases the overall building weight, but also has a large thermal conductivity that cannot meet the requirements of building energy-saving development. Not only increase the building cost, but also reduce the indoor use area

Method used

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  • Desulfurized-gypsum-base lightweight spraying gypsum mortar

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Effect test

Embodiment 1

[0031] A desulfurized gypsum-based lightweight spraying gypsum mortar, which consists of the following components in parts by weight: 50 parts of desulfurized gypsum, 30 parts of construction sand with a particle size of 30-50 mesh, and vitrified microbeads with a particle size of 50-70 mesh 3 Parts, 16 parts of stone powder, 0.1 part of sodium citrate retarder, 0.1 part of hydroxypropyl methylcellulose ether with a viscosity of 60,000, 0.04 part of sodium alkylbenzenesulfonate air-entraining agent, 0.05 part of starch ether, wherein, The desulfurization gypsum is hemihydrate gypsum obtained by calcining waste residue produced after flue gas desulfurization.

Embodiment 2

[0033] A desulfurized gypsum-based lightweight spraying gypsum mortar, which consists of the following components in parts by weight: 65 parts of desulfurized gypsum, 20 parts of construction sand with a particle size of 30-50 mesh, and vitrified microbeads with a particle size of 50-70 mesh 5 10 parts of stone powder, 0.5 part of sodium tripolyphosphate retarder, 0.3 part of hydroxyethyl methyl cellulose ether with a viscosity of 30,000, 0.02 part of sodium alkylaryl sulfonate air-entraining agent, 0.1 part of starch ether, Wherein, the desulfurization gypsum is hemihydrate gypsum obtained by calcining waste residue produced after flue gas desulfurization.

Embodiment 3

[0035] A desulfurized gypsum-based lightweight spraying gypsum mortar, which consists of the following components in parts by weight: 50 parts of desulfurized gypsum, 25 parts of construction sand with a particle size of 30-50 mesh, and vitrified microbeads with a particle size of 50-70 mesh 4 parts, 20 parts of stone powder, 0.2 parts of sodium hexametaphosphate retarder, 0.2 parts of hydroxypropyl methylcellulose ether with a viscosity of 40,000, 0.025 parts of sodium alkylbenzenesulfonate air-entraining agent, and 0.07 parts of starch ether, of which , the desulfurization gypsum is hemihydrate gypsum obtained by calcining the waste residue produced after flue gas desulfurization.

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Abstract

Disclosed desulfurized-gypsum-base lightweight spraying gypsum mortar is composed of the following compositions in parts by weight: 50-65 parts of desulfurized gypsum, 20-30 parts of building sand, 3-5 parts of vitrified microsphere, 10-20 parts of stone powder, 0.1-0.5 part of a retarder, 0.1-0.3 part of cellulose ether, 0.02-0.04 part of an air-entraining agent, and 0.05-0.1 part of starch ether. The desulfurized-gypsum-base lightweight spraying gypsum mortar employs mechanical spraying for construction, possesses the dry density less than 1000 Kg/m<3>, the heat-conduction coefficient of 0.20 W/(m*K) and the compressive strength lager than 4.0 MPa, and possesses the characteristics of being light in weight, low in heat-conduction coefficient, high in strength and suitable for mechanical spraying construction, and the like.

Description

technical field [0001] The invention relates to the technical field of solid waste comprehensive utilization and building materials, in particular to a desulfurized gypsum-based lightweight sprayed gypsum mortar. Background technique [0002] With the wide application of flue gas desulfurization technology in thermal power plants in my country, the output of desulfurized gypsum has increased rapidly. By the end of 2010, the annual output of desulfurized gypsum in China has exceeded 37.9 million tons. The stacking of these industrial by-products of gypsum not only takes up a lot of land, but also pollutes the environment. [0003] After plastering the wall with cement mortar, problems such as hollowing, cracking, and falling off are prone to occur. Gypsum mortar is made of hemihydrate gypsum as the cementitious material, supplemented with aggregate, functional additives, etc. It is used as a plastering material for the interior walls and ceilings of buildings. , no shrinkag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B14/22
Inventor 吴开胜李龙梓许霞王路艳施友烽
Owner JIANGSU NIGAO SCI & TECH
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